Difference between revisions of "Linux Boot Logo"

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On this page we will explain you how to change the Boot Logo/Screen of Linux.
 
On this page we will explain you how to change the Boot Logo/Screen of Linux.
  
−
By default the following screen is displayed on you LCD:
+
By default the following screen is displayed on your LCD:<br><br>
 
[[Image:Default_Boot.png]]
 
[[Image:Default_Boot.png]]
  
−
# create a new image fitting the size of your LCD (320x240 or 480x272), with [http://www.gimp.org/ The Gimp] for example
+
===Create an image to suitable format (C include file)===
−
# save it in '''PNM ASCII''' file format, let's say ''boot_logo.pnm''
+
# create a new image fitting the size of your LCD (320x240, 480x272 or 800x480), with [http://www.gimp.org/ The Gimp] (for example).
 +
# save it in '''PPM RAW''' file format, let's say ''my_boot_logo.ppm''
 
# install Netpbm package: <pre>$ sudo apt-get install netpbm </pre>
 
# install Netpbm package: <pre>$ sudo apt-get install netpbm </pre>
−
# reduce number of colors in your image to 224: <pre> $ ppmquant 224 boot_logo.pnm > boot_logo_224.pnm </pre>
+
# reduce the number of colors in your image to 224: <pre class="host">$ ppmquant 224 my_boot_logo.ppm > my_boot_logo_224.ppm</pre>
−
# convert it to C file:
+
# convert it to PPM ASCII format (if ''pnmnoraw'' is not available on your distribution (ex: LUbuntu 17.10), try with ''pnmtoplainpnm''): <pre class="host">$ pnmnoraw my_boot_logo_224.ppm > my_boot_logo_ascii_224.ppm</pre>
 +
# get the armadeus envt variables: <pre class="host">$ make shell_env && source armadeus_env.sh</pre>
 +
# copy the PPM to ''$ARMADEUS_LINUX_DIR/drivers/video/logo/'' directory '''with a name ending with _clut224.ppm''': <pre>$ cp my_boot_logo_ascii_224.ppm $ARMADEUS_LINUX_DIR/drivers/video/logo/logo_custom_clut224.ppm</pre>
 +
# Linux will automatically convert your .ppm to a .c file, after you have added it to the build system, using the ''$ARMADEUS_LINUX_DIR/scripts/pnmtologo'' script. This is the purpose of the next step.
 +
 
 +
===Add your file to Linux build system===
 +
# If you have overwritten ''$ARMADEUS_LINUX_DIR/drivers/video/logo/logo_armadeus_clut224.ppm'' with your own logo at the previous stage, then you can jump to [[#Recompile_.26_install_kernel|the next step]]; otherwise:
 +
# Edit ''$ARMADEUS_LINUX_DIR/drivers/video/logo/Makefile''
 +
# Put it your logo file name at line 18 (replace current one): <pre> obj-$(CONFIG_LOGO_ARMADEUS_CLUT224)    += logo_custom_clut224.o</pre>
 +
# Edit ''$ARMADEUS_LINUX_DIR/drivers/video/logo/logo.c''
 +
# Add it your logo C struct name at line 39: <source lang="C">extern const struct linux_logo logo_custom_clut224;</source>
 +
# Put it your logo C struct name at line 122 (replace current one):
 +
<source lang="C">
 +
#ifdef CONFIG_LOGO_ARMADEUS_CLUT224
 +
    /* Armadeus Linux logo */
 +
    logo = &logo_custom_clut224;
 +
#endif
 +
</source>
 +
 
 +
===Recompile & install kernel===
 +
*Make sure that the "Armadeus Logo" option is selected in:
 +
<pre class="host">
 +
$ make linux-menuconfig
 +
</pre>
 +
<pre class="config">
 +
Device Drivers  --->
 +
    Graphics support  --->
 +
        [*] Bootup logo  --->
 +
            [*]  224-color Armadeus Linux logo
 +
</pre>
 +
*Then recompile your kernel:
 +
<pre class="host">
 +
$ make linux
 +
</pre>
 +
and install it on your board.
 +
*Restart your board and you should see your image:<br>
 +
 
 +
[[Image:Custom_Boot_Logo_with_login.png]]
 +
 
 +
===Remove Login from framebuffer terminal===
 +
# On your target, edit ''/etc/inittab''
 +
# Comment line 28: <source lang="bash">#tty1::respawn:/sbin/getty 38400 tty1</source>
 +
# save it and restart your system
 +
 
 +
===Deactivate remaining cursor===
 +
It may be a remaining cursor at the left upper corner of the screen. Indeed virtual console cursor is activated by default in Linux. To deactivate it at boot stage, you will have to:
 +
* on recent kernels (3.8+), follow tips [[FrameBuffer#Tips|here]]
 +
* otherwise:
 +
# Edit source file $ARMADEUS_LINUX_KERNEL/drivers/char/vt.c
 +
# Near line 1620, in function ''reset_terminal()'', change <source lang="c">vc->vc_deccm = 1;</source> with <source lang="c">vc->vc_deccm = 0;</source>
 +
# recompile and reflash your kernel
 +
After this modification, at any moment, you can get your blinking cursor back with:
 +
<pre class="apf">
 +
# echo -e '\033[?25h' > /dev/tty1
 +
# echo 1 > /sys/class/graphics/fbcon/cursor_blink
 +
</pre>
 +
 
 +
==Links==
 +
*[[FrameBuffer#Tips|Other Framebuffer tips]]
 +
* http://netpbm.sourceforge.net/doc/pnmquant.html
 +
* [http://www-curri.u-strasbg.fr/documentation/calcul/doc/ProPack/3SP1/docs/man_html/man4/console_codes.4.html Linux console ESC sequences]
 +
* [[U-Boot_Splash_Screen| U-Boot Splashscreen]]
 +
 
 +
[[Category: Boot Logo]]

Latest revision as of 10:28, 21 June 2018

On this page we will explain you how to change the Boot Logo/Screen of Linux.

By default the following screen is displayed on your LCD:

Default Boot.png

Create an image to suitable format (C include file)

  1. create a new image fitting the size of your LCD (320x240, 480x272 or 800x480), with The Gimp (for example).
  2. save it in PPM RAW file format, let's say my_boot_logo.ppm
  3. install Netpbm package: 
    $ sudo apt-get install netpbm
  4. reduce the number of colors in your image to 224: 
    $ ppmquant 224 my_boot_logo.ppm > my_boot_logo_224.ppm
  5. convert it to PPM ASCII format (if pnmnoraw is not available on your distribution (ex: LUbuntu 17.10), try with pnmtoplainpnm): 
    $ pnmnoraw my_boot_logo_224.ppm > my_boot_logo_ascii_224.ppm
  6. get the armadeus envt variables: 
    $ make shell_env && source armadeus_env.sh
  7. copy the PPM to $ARMADEUS_LINUX_DIR/drivers/video/logo/ directory with a name ending with _clut224.ppm: 
    $ cp my_boot_logo_ascii_224.ppm $ARMADEUS_LINUX_DIR/drivers/video/logo/logo_custom_clut224.ppm
  8. Linux will automatically convert your .ppm to a .c file, after you have added it to the build system, using the $ARMADEUS_LINUX_DIR/scripts/pnmtologo script. This is the purpose of the next step.

Add your file to Linux build system

  1. If you have overwritten $ARMADEUS_LINUX_DIR/drivers/video/logo/logo_armadeus_clut224.ppm with your own logo at the previous stage, then you can jump to the next step; otherwise:
  2. Edit $ARMADEUS_LINUX_DIR/drivers/video/logo/Makefile
  3. Put it your logo file name at line 18 (replace current one): 
     obj-$(CONFIG_LOGO_ARMADEUS_CLUT224)     += logo_custom_clut224.o
  4. Edit $ARMADEUS_LINUX_DIR/drivers/video/logo/logo.c
  5. Add it your logo C struct name at line 39: 
    extern const struct linux_logo logo_custom_clut224;
  6. Put it your logo C struct name at line 122 (replace current one): 
#ifdef CONFIG_LOGO_ARMADEUS_CLUT224
    /* Armadeus Linux logo */
    logo = &logo_custom_clut224;
#endif

Recompile & install kernel

  • Make sure that the "Armadeus Logo" option is selected in:
$ make linux-menuconfig

Device Drivers  --->
    Graphics support  --->
        [*] Bootup logo  --->
            [*]   224-color Armadeus Linux logo
  • Then recompile your kernel:
 $ make linux

and install it on your board.

  • Restart your board and you should see your image:

Custom Boot Logo with login.png

Remove Login from framebuffer terminal

  1. On your target, edit /etc/inittab
  2. Comment line 28: 
    #tty1::respawn:/sbin/getty 38400 tty1
  3. save it and restart your system

Deactivate remaining cursor

It may be a remaining cursor at the left upper corner of the screen. Indeed virtual console cursor is activated by default in Linux. To deactivate it at boot stage, you will have to:

  • on recent kernels (3.8+), follow tips here
  • otherwise:
  1. Edit source file $ARMADEUS_LINUX_KERNEL/drivers/char/vt.c
  2. Near line 1620, in function reset_terminal(), change 
    vc->vc_deccm		= 1;
    with 
    vc->vc_deccm		= 0;
  3. recompile and reflash your kernel

After this modification, at any moment, you can get your blinking cursor back with: 

# echo -e '\033[?25h' > /dev/tty1
# echo 1 > /sys/class/graphics/fbcon/cursor_blink

Links

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